From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: [v2,1/2] dma-mapping: move dma configuration to bus infrastructure From: Christoph Hellwig Message-Id: <20180322081530.GA29444@lst.de> Date: Thu, 22 Mar 2018 09:15:30 +0100 To: Nipun Gupta Cc: robin.murphy@arm.com, hch@lst.de, linux@armlinux.org.uk, gregkh@linuxfoundation.org, m.szyprowski@samsung.com, bhelgaas@google.com, zajec5@gmail.com, andy.gross@linaro.org, david.brown@linaro.org, dan.j.williams@intel.com, vinod.koul@intel.com, thierry.reding@gmail.com, robh+dt@kernel.org, frowand.list@gmail.com, jarkko.sakkinen@linux.intel.com, rafael.j.wysocki@intel.com, dmitry.torokhov@gmail.com, johan@kernel.org, msuchanek@suse.de, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, linux-wireless@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org, dmaengine@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, devicetree@vger.kernel.org, linux-pci@vger.kernel.org, bharat.bhushan@nxp.com, leoyang.li@nxp.com List-ID: PiArc3RhdGljIGludCBhbWJhX2RtYV9jb25maWd1cmUoc3RydWN0IGRldmljZSAqZGV2KQo+ICt7 Cj4gKwlyZXR1cm4gZG1hX2NvbW1vbl9jb25maWd1cmUoZGV2KTsKPiArfQoKU28gaXQgdHVybnMg b3V0IHdlIG9ubHkgZW5kIHdpdGggdHdvIGNhbGxlcnMgb2YgZG1hX2NvbW1vbl9jb25maWd1cmUK YWZ0ZXIgdGhpcyBzZXJpZXMuICBCYXNlZCBvbnQgaGF0IEknbSB0ZW1wdGVkIHdpdGggdGhlIHN1 Z2dlc3Rpb24KZnJvbSBSb2JpbiB0byBqdXN0IGhhdmUgYW1iYSBjYWxsIHBsYXRmb3JtX2RtYV9j b25maWd1cmUsIGFuZCBtb3ZlCnRoZSBjb2RlIGZyb20gZG1hX2NvbW1vbl9jb25maWd1cmUgdG8g cGxhdGZvcm1fZG1hX2NvbmZpZ3VyZS4KCj4gK2ludCBkbWFfY29uZmlndXJlKHN0cnVjdCBkZXZp Y2UgKmRldikKPiArewo+ICsJaWYgKGRldi0+YnVzLT5kbWFfY29uZmlndXJlKQo+ICsJCXJldHVy biBkZXYtPmJ1cy0+ZG1hX2NvbmZpZ3VyZShkZXYpOwo+ICsKPiArCXJldHVybiAwOwo+ICt9Cj4g IHZvaWQgZG1hX2RlY29uZmlndXJlKHN0cnVjdCBkZXZpY2UgKmRldikKCkFzIGdyZXAgcG9pbnRl ZCBvdXQgdGhpcyB3YW50cyBhIGJsYW5rIGxpbmUgYWZ0ZXIgdGhlIGZ1bmN0aW9uLCBhbmQgd2hp bGUKaW4gbml0cGlja2luZyBtb2RlIEknZCBzdWdnZXN0IHRvIHJlbW92ZSB0aGUgYmxhbmsgbGlu ZSBhYm92ZSB0aGUgcmV0dXJuCnN0YXRlbWVudCB3aGlsZSBhdCBpdC4KCj4gZGlmZiAtLWdpdCBh L2RyaXZlcnMvZ3B1L2hvc3QxeC9idXMuYyBiL2RyaXZlcnMvZ3B1L2hvc3QxeC9idXMuYwo+IGlu ZGV4IDg4YTM1NTguLmZhOTg5NmQgMTAwNjQ0Cj4gLS0tIGEvZHJpdmVycy9ncHUvaG9zdDF4L2J1 cy5jCj4gKysrIGIvZHJpdmVycy9ncHUvaG9zdDF4L2J1cy5jCj4gQEAgLTMxNCw2ICszMTQsMTQg QEAgc3RhdGljIGludCBob3N0MXhfZGV2aWNlX21hdGNoKHN0cnVjdCBkZXZpY2UgKmRldiwgc3Ry dWN0IGRldmljZV9kcml2ZXIgKmRydikKPiAgCXJldHVybiBzdHJjbXAoZGV2X25hbWUoZGV2KSwg ZHJ2LT5uYW1lKSA9PSAwOwo+ICB9Cj4gIAo+ICtzdGF0aWMgaW50IGhvc3QxeF9kbWFfY29uZmln dXJlKHN0cnVjdCBkZXZpY2UgKmRldikKPiArewo+ICsJaWYgKGRldi0+b2Zfbm9kZSkKPiArCQly ZXR1cm4gb2ZfZG1hX2NvbmZpZ3VyZShkZXYsIGRldi0+b2Zfbm9kZSk7Cj4gKwo+ICsJcmV0dXJu IDA7CgpTYW1lIGhlcmUuCgo+ICsgKi8KPiArc3RhdGljIGludCBwY2lfZG1hX2NvbmZpZ3VyZShz dHJ1Y3QgZGV2aWNlICpkZXYpCj4gK3sKPiArCXN0cnVjdCBkZXZpY2UgKmJyaWRnZTsKPiArCWVu dW0gZGV2X2RtYV9hdHRyIGF0dHI7Cj4gKwlpbnQgcmV0ID0gMDsKPiArCj4gKwlicmlkZ2UgPSBw Y2lfZ2V0X2hvc3RfYnJpZGdlX2RldmljZSh0b19wY2lfZGV2KGRldikpOwo+ICsKPiArCWlmIChJ U19FTkFCTEVEKENPTkZJR19PRikgJiYgYnJpZGdlLT5wYXJlbnQgJiYKPiArCSAgICBicmlkZ2Ut PnBhcmVudC0+b2Zfbm9kZSkgewo+ICsJCXJldCA9IG9mX2RtYV9jb25maWd1cmUoZGV2LCBicmlk Z2UtPnBhcmVudC0+b2Zfbm9kZSk7Cj4gKwl9IGVsc2UgaWYgKGhhc19hY3BpX2NvbXBhbmlvbihi cmlkZ2UpKSB7Cj4gKwkJYXR0ciA9IGFjcGlfZ2V0X2RtYV9hdHRyKHRvX2FjcGlfZGV2aWNlX25v ZGUoYnJpZGdlLT5md25vZGUpKTsKPiArCQlpZiAoYXR0ciAhPSBERVZfRE1BX05PVF9TVVBQT1JU RUQpCj4gKwkJCXJldCA9IGFjcGlfZG1hX2NvbmZpZ3VyZShkZXYsIGF0dHIpOwo+ICsJfQoKVGhl IGF0dHIgZGVjbGFyYXRpb24gY2FuIGJlIG1vdmVkIGludG8gdGhlIGlubmVyIHNjb3BlIGhlcmUu Cgo+ICsJcGNpX3B1dF9ob3N0X2JyaWRnZV9kZXZpY2UoYnJpZGdlKTsKPiArCj4gKwlyZXR1cm4g cmV0OwoKRHJvcCB0aGUgYmxhbmsgbGluZSBhZnRlciB0aGUgcmV0dXJuLCBwbGVhc2UuCi0tLQpU byB1bnN1YnNjcmliZSBmcm9tIHRoaXMgbGlzdDogc2VuZCB0aGUgbGluZSAidW5zdWJzY3JpYmUg ZG1hZW5naW5lIiBpbgp0aGUgYm9keSBvZiBhIG1lc3NhZ2UgdG8gbWFqb3Jkb21vQHZnZXIua2Vy bmVsLm9yZwpNb3JlIG1ham9yZG9tbyBpbmZvIGF0ICBodHRwOi8vdmdlci5rZXJuZWwub3JnL21h am9yZG9tby1pbmZvLmh0bWwK